When asked about the rumours during his visit to France, Mr Abbott said he does not lightly reshuffle his team and all his ministers should continue focussing on their existing work.

"Everyone is absolutely immersed in doing the right thing in their portfolio and that should continue," Mr Abbott said.

However, Defence Minister David Johnston has conceded that other MPs have an eye on his job, but says his fate is in the hands of the Prime Minister.

"I just get on with doing my job, which may I say is a very onerous and difficult one," he said.

"I have a broad spectrum of duties, that I take extremely seriously. I enjoy the job. I'm at the whim, the benefit, the consideration of the Prime Minister. Whatever he decides to do, I'm very happy.

"I enjoy my job and everyone wants my job because I deal with such great people."

Mr Johnston said the Prime Minister has told him he is satisfied with his performance.

Senator Sinodinos stepped aside from his frontbench position in March after the NSW Independent Commission Against Corruption signalled it wanted to question him over claims he used his political position to further the interests of Australian Water Holdings.